The Direct Select Address (DSA) may be coded in word 7
of the reference code.
About this task
This DSA is a PCI system bus number. With the following information,
and the information in the card position table, you can isolate a
failing PCI bus. Use the following instructions to translate the DSA:
Procedure
- The DSA is of the form BBBB xxxx, and separates into the
following parts:
- BBBB = bus number
- xxxx = not used
- The bus number is a PCI bus number in hexadecimal. Convert
the number to decimal, and then continue with the next step.
- Use one of the following guides to determine the type of
system unit or expansion unit in which the bus is located:
- If you are using a management console interface, view the managed
system's properties on the management console.
- If you are using AIX® or Linux®, use the command line interface
to determine the enclosure type. On the command line, type the following:
lshwres -r io --rsubtype bus
The
result will be in the form:
unit_phys_loc=Uxxxx.yyy.zzzzzzz,bus_id=a,
......
Find the bus ID "a" entry that matches the
decimal bus number you determined in step 2. Using the corresponding
Uxxxx value, look up the unit model or enclosure type using the Unit
Type and Locations table in Part
locations and location codes.
- See Card positions to
search for the bus number that matches the system unit or expansion
unit type where the bus is located. This ends the procedure.